Ask HN: What is bad about Homebrew?

I've seen a number of comments characterizing homebrew, the package manager, as bad but it was usually in an offhand way.

The most annoying thing I've come across recently is that one can't downgrade to an old version (unless there's a specific formula). Htop 3.4. shows CPU usage 40x too small (on macOS) and to fix that I can't use brew.